Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand.
Trends Plant Sci. 2013 Sep;18(9):492-5. doi: 10.1016/j.tplants.2013.04.009. Epub 2013 May 24.
The origin of land plants is a fundamental topic in plant evolutionary biology. Despite the crucial importance for knowing the closest lineages of land plants, this question has not been fully answered yet. Using recently available nuclear sequences from streptophyte algae, the multispecies coalescent model produces a congruent phylogeny that is robust to different data sets, in contrast to the conflicting phylogenies produced by the concatenation method. Using phylogenomic data and the coalescent model, in this opinion article we postulate that the Zygnematales are the closest lineages of land plants. We suggest that the coalescent model can accommodate gene tree heterogeneity in deep-level phylogenies and can be potentially used to resolve other deep species phylogenies.
陆地植物的起源是植物进化生物学的一个基本课题。尽管了解陆地植物最接近的谱系至关重要，但这个问题尚未得到完全解答。使用最近从石莼藻类中获得的核序列，多物种聚合法产生了一个一致的系统发育树，与连锁法产生的冲突系统发育树相比，该系统发育树具有更强的稳健性。在本文中，我们使用基因组数据和聚合法假设，认为织线藻目是陆地植物最接近的谱系。我们建议聚合法可以适应深层系统发育中基因树的异质性，并有可能用于解决其他深层物种的系统发育问题。
